$\left(-a-3\right)^3$

$\lim_{x\to1}\left(\frac{1-x+ln\:x}{1+cos\:\pi x}\right)$

$\lim_{x\to1}\left(\frac{2\cdot x+1}{x+2}\right)^{\frac{1}{x-1}}$

$6\sin\left(x\right)^2-\sin\left(x\right)-2=0$

$-5x^2-12x^2-8x^2$

$\left(a-b\right)\left(b\right)\left(a\right)\left(b\right)$

$2x^2=x$